ASTROSAT CZTI

Data Quality Report

Orbit 20180304_A04_094T01_9000001942_level2

Creation date: 2025-11-19T21:33:12.518371
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A04_094T01_9000001942cztM0_level2.fits modeM0/AS1A04_094T01_9000001942cztM0_level2_quad_clean.evt
Size (bytes)917,101,440953,769,600
Size874.6 MB 909.6 MB
Events in quadrant A5,541,9345,733,581
Events in quadrant B5,158,4065,604,506
Events in quadrant C5,557,9445,641,056
Events in quadrant D4,728,2005,123,730

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020160
B020160
C020160
D020160

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02122430
B02566280
C02033380
D02413760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9897013761.390320%
B9897276747.753708%
C989789931.003253%
D9896939303.970940%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 115329 98979 0 0 0.00% 0.00%
B 115329 98150 0 0 0.00% 0.00%
C 115329 98978 0 0 0.00% 0.00%
D 115329 98858 0 0 0.00% 0.00%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 29 5337 11.11 1442 1348 358.9
A 7 110 4562 8.95 1442 1348 358.9
A 0 30 4130 7.75 1442 1348 358.9
B 2 9 4436 11.74 1362 1297 267.3
B 5 128 3441 8.02 1362 1297 267.3
B 3 17 3435 8.0 1362 1297 267.3
C 12 241 3957 6.8 1469 1368 380.5
C 2 191 3753 6.27 1469 1368 380.5
C 3 126 3690 6.1 1469 1368 380.5
D 3 14 3395 6.03 1349 1229 359.2
D 6 231 3387 6.01 1349 1229 359.2
D 3 31 3263 5.66 1349 1229 359.2

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter